Crystal structure of diaqua-bis(N,N-dimethylformamide-κ¹ O)-bis{3-((5-chloro-2-oxidobenzylidene)amino)-2-oxo-2H-chromen-4-olato-κ⁴ N,O,O′:O′}dinickel(II), C₃₈H₃₄Ni₂Cl₂N₄O₁₂

Abstract

CCDC no.: 1544255The dinuclear title complex is shown in the figure. Tables 1 and 2 contain details on crystal structure and measurement conditions and a list of the atoms including atomic coordinates and displacement parameters. Source of materialSynthesis of the ligand HL: All reagents and starting materials were obtained from commercial suppliers and used as received. To an ethanol solution (5 mL) of 5-chloro-2-hydroxybenzaldehyde (156.6 mg, 1 mmol) was added an Synthesis of the nickel(II) complex:To a stirred solution of the aforementioned ligand (3.14 mg, 0.01 mmol) in acetone/N,N-dimethylformamide (V/V = 5:1) (6 mL) was added nickel(II) acetate tetrahydrate (2.48m g, 0.01 mmol) in methanol (1 mL) at room temperature. The resultant yellow solution was allowed to evaporate at room temperature in the dark for about two weeks. Pale green block crystals suitable for crystal structure determination were obtained. Elemental analysis-anal. calcd. for C 38 H 34 Ni 2 Cl 2 N 4 O 12 : C, 49.24; H, 3.70; N, 6.04. Found (%): C, 50.12; H, 3.25; N, 6.21. Experimental detailsHydrogen atoms were placed in their geometrically idealized positions and constrained to ride on their parent atoms. DiscussionSchiff bases easily coordinate metal ions as chelating ligands [3][4][5][6]. These schiff base ligands and their metal complexes could be utilized in obtaining luminescence materials [7][8][9][10], biological systems [11,12], magnetic materials [13][14][15], and supramolecular constructing [16,17]. Herein, a new binuclear nickel(II) complex with coumarin-Schiff base ligand has been synthesized [18][19][20].